Adhyatma Ramayana is an ancient Sanskrit work extolling the spiritual virtues of the story of Ramayana. It comprises around 4200 verses, is embedded in BrahmÄnda Purana and is considered to be authored by Ved Vyasa. This pious story was recited to the universal mother Parvathi by the Lord Shankara. The fifth adhyaya of the uttara kanda of AR is a conversation between Lord Rama and his brother, Lakshmana. This is usually called the Rama GITA. It is purely advaitic and very interesting to read.